Abstract
The development of teeth through epithelial-mesenchymal interactions is mediated on a molecular level by a network of secreted growth factors and responsive transcription factors. Although zinc finger transcription factors constitute by far the largest class of transcriptional regulators with an estimated number of approximately 1000 genes present in mammals [14], little is known about their role in the regulation of mineralized tissue formation. A fragment (Y150) of the novel C 2 H 2 zinc finger transcription factor Krox-26 has initially been isolated from highly proliferative dental pulp tissue in rats [19]. The objective of this study was to clone the full-length cDNA sequence of the murine homologue and to determine its mRNA and protein expression pattern during mouse embryonic development. Mouse Krox-26 contains five C 2 H 2 zinc finger repeats. Its expression was found to be most prominent in the developing craniofacial bones and dental organs. These results suggest Krox-26 as a potential regulator of gene transcription during the development of teeth and the craniofacial skeleton.
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